Super Tuesday was a strong showing for former Massachusetts Gov. Mitt Romney, but was it strong enough?

On Fox News’ coverage of Super Tuesday, Washington Post columnist Charles Krauthammer explained why Romney’s performance left much to be desired and how the wins he chalked up happened in states he was expected to win. But despite coming well short of dominating his rivals, Krauthammer said, Romney remains the front-runner — albeit a weak one.

“It doesn’t change the big picture, which is that Romney, slow and steady and collecting the delegates and the wins he’s winning, is a relatively weak front-runner,” Krauthammer said. “I mean, look where he won, tonight: Massachusetts and Vermont, home court. That’s like Gingrich winning Georgia. That’s like [Stephen] Hayes winning Wisconsin.”

Krauthammer said that Romney’s position at the top doesn’t inspire a lot of confidence for Republicans worried about Election Day.

“He is the front-runner, he picks up all of the delegates,” Krauthammer said. “But he is not a strong front-runner you’d like to see. If you’re a Republican and you’re seeing how the field is slipping vis-à-vis Obama in the national polls.”

Romney, Krauthammer argued, isn’t strengthening his hand as the primary continues. Instead, he said Romney’s stature as a strong candidate is diminishing.

“So, I think in the end, it’s the slow and steady of the tortoise, you know, gathering up delegates,” he said. “Romney, who’s on his way, but it’s going to be a painful, long trip. And he gets weaker, not stronger, I think, with every week.”